코드 쇼 :
#include <stdio.h>
int main(){
int year,month,days;
printf("请输入年月\n");
scanf("%d%d",&year,&month);
switch(month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: days=31;break;
case 4:
case 6:
case 9:
case 11: days = 30;break;
case 2:if((year%4==0)&&(year%100!=0)||year%400==0){
days = 29;
}else {
days = 28;
}
break;
default: printf("输入的年月有问题");
}
printf("year=%d,month=%d,days=%d\n",year,month,days);
return 0;
}